YAML Formatter
Fix indentation, normalize spacing, and validate YAML documents.
YAML is a human-readable data format commonly used for configuration files (like Docker Compose, Kubernetes, and CI/CD pipelines) where whitespace and indentation are meaningful. This tool formats and validates YAML, catching indentation errors and syntax issues that are easy to introduce by hand since YAML is very sensitive to exact spacing.
Frequently asked questions
YAML uses indentation (not brackets/braces) to define structure, so inconsistent spacing or tabs-vs-spaces mixing can silently change the meaning of a file or cause parsing errors - this tool helps catch those issues before they cause problems in production.
Use the dedicated YAML ⇄ JSON converter tool if you need to convert between the two formats rather than just cleaning up YAML formatting.
It validates syntax and structure; logical/semantic errors specific to whatever system consumes your YAML (like an invalid Kubernetes field name) would still need checking against that system's own schema.